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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Why bwnedict reagent gives red color in presence of added sugars? |
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Answer» Ⓗⓔⓨ_______ |
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| 2. |
Why are allylic radicals more stable when compared to alkyl radicals? |
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Answer» ANSWER: ALLYLIC RADICALS are more stable as compared to alkyl hallides because allylic radicals are resonance stablized and alkyl radical itself is very unstable. |
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| 3. |
Classify butter getting rancid is chemical or physical change? |
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Answer» Answer: Explanation: It is a chemical change as the BACTERIA in the butter change the properties of the actual butter. |
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| 4. |
The no. Of atoms of Cr and o are 4.8*10power10 and 9.6 *10 power 10 it's empirical formula is |
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Answer» Explanation: We know that the valency of Oxygen is 2 so the oxidation state is -2 Hence let's take the oxidation state of CHROMIUM to be x so Hence the oxidation state is 4 so one atom of Chromium is oxidised by two atoms of Oxygen so Empirical formula is CrO2. HOPE it HELPS you. |
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| 5. |
What fraction of reactant remains after 40 minutes if the half is 20 minutes? |
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| 6. |
What happens when a solution of an acid is mixed with a solution of a base? |
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Answer» the h+ aquous ION of acid combineswith OH- ion to form a NEUTRAL molecule.... |
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| 7. |
What happens to sugar when it is dissolved in water where does the sugar go? |
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Answer» Answer: The sugar mixes with the water molecules and SEEMS to have DISAPPEARED but if we TASTE the water we will find that the water is SWEET. |
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| 8. |
What are amphoteric oxides give relevant chemical equation to show the reactivity with acid and base? |
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Answer» Explanation: Answer: OXIDES of metals which have both acidic as well as basic behaviour are known as amphoteric oxides. Such metallic oxides react with ACIDS as well as base to PRODUCE salt and WATER. Examples of Amphoteric oxides are aluminium oxide and zinc oxide. |
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| 9. |
What are the reactants and end products for both light and dark reactions? |
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Answer» Explanation: Dark reactions make USE of these ORGANIC energy molecules (ATP and NADPH). This reaction cycle is also called Calvin BENISON Cycle, and it OCCURS in the stroma. ATP provides the energy while NADPH provides the electrons required to fix the CO2 (carbon dioxide) into carbohydrates. |
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| 10. |
What are the raw material use during photosynthesis write chamecial equation fof this? |
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Answer» Answer: 6CO2 + 12H20 + LIGHT = C6H12O6 + 6O2 + 6H20. |
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| 11. |
to study the nature of different Chemicals required knowledge of the fundamental building blocks of all chemical the molecules it is true or false |
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Answer» Answer: True. Explanation: We must study the NATURE of different Chemicals required knowledge of the FUNDAMENTAL BUILDING blocks of all chemical the molecules. |
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| 12. |
Which of the pairs of elements is in the same period |
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| 13. |
How an equation becomes more informative? |
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Answer» •By writing PHYSICAL STATES of reactants and products. •By writing under the conditions where reaction is TAKING place. •By BALANCING it. |
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| 14. |
Velocity of sound in hydrogen at ntp is v what will be the velocity of sound in a mixture of hydrogen and oxygen in the ratio 4 is to 1 at ntp is |
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Answer» ANSWER : 635m/s ☑️☑️☑️☑️ |
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| 15. |
The residue left after extracting juice from sugar beet and sugarcane is called |
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Answer» Answer: Bagasse is the dry PULPY FIBROUS RESIDUE that remains after sugarcane or sorghum STALKS are crushed to extract their juice. ... For EVERY 10 tonnes of sugarcane crushed, a sugar factory produces nearly .. |
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| 16. |
1,3,5 trihydroxybenzene and 1,2,4 trihydroxybenzene which has higher enol content? |
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Answer» ANSWER: 1,2,4-TRIHYDROXYBENZENE has higher enol CONTENT than 1,3,5 trihydroxybenzene because PHENOLS are Ortho/Para Directors. |
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| 17. |
The product obtained on reaction of alkyl halide with mg/ether followed by hydrolysis is |
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Answer» Answer: The product OBTAINED on reaction of alkyl hallide with Mg/Dry ETHER FOLLOWED by HYDROLYSIS is Alkane. |
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| 18. |
The process of release of ammonia and its formation to ammonium ions is known as |
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Answer» The process of RELEASE of ammonia and its formation to AMMONIUM ions is KNOWN as Haber's Process. |
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| 19. |
The sum no. Of neutron and protons in one of the isotopes of hydrogen is |
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Answer» 1 in PROTIUM . ( it has 1 PROTON but no newtron 2 indeuterium 3 in tritium |
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| 20. |
How many tertiary hydrogen atoms are present in tat.-butly bromide |
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Answer» ANSWER: There are TOTAL 6 HYDROGEN in the tert-butylbromide. |
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| 21. |
.COHOLS, PHENOLS AND ETHERSPHENOLSOBJECTIVE EXERCISE-1Phenol can be prepared from1) Benzene diazonium chloride2) Chlorobenzene3) Sodium benzene sulfonate 4) All |
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Answer» CHLOROBENZENE HOPE it HELPS U... |
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| 22. |
MULTIPLE CHOICE QUESTIONSWhich of the following correctly represents 360 g of water?(i) 2 moles of H2O(ii) 20 moles of water(iii) 6.022 x 1023 molecules of water(iv) 1.2044 1025 molecules of water| (a) (1)(b) (I) and (iv)(c) (ii) and (iii)(d) (i) and (iv)The chemical symbol for nitrogen gas is(a) Ni(6) Na(d) N(C) N+ |
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Answer» Answer: 20 moles of water REPRESENTS 360 G of water. |
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| 23. |
5 marks question class 11chemistrydont spam |
Answer» ✌Here is your answer✌refer to the ATTACHMENT |
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| 25. |
What is the difference between molar mass and molar weight? |
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Answer» Answer: hey dear.. here is your answer.. pls mark me as brainliest.. molar WEIGHT:Molecular weight is the mass of one molecule, measured in atomic mass units (amu). For example, water has two hydrogen atoms and one oxygen atom. molar mass:Molar mass is the mass of a mole of molecules, measured in grams or kilograms per mole. In other words, the molar mass of a compound TELLS you the mass of one mole of that substance. For example, water has two hydrogen atoms and one oxygen atom. As per the periodic table, the atomic weight of hydrogen is 1 gram, and the atomic weight of oxygen is 16 grams. To CALCULATE the molecular weight of one water molecule, you ADD (2 x 1) + 16 = 18 grams. The total molar mass of water is 18 grams per mole.... hope this helped you. |
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| 26. |
What is the chemical name of ferrous sulphate heptahydrate? |
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Answer» Answer: hey DEAR.. here is your answer. and PLS mark me as brainliest.. Explanation: |
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| 27. |
If the difference in boiling points of the two liquid is not much , which distillation is used for separation of liquids? |
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Answer» Explanation: Fractional distillation is used to separate different liquids from a mixture of liquids. It is USEFUL for separating ethanol from a mixture of ethanol and water, and for separating different FRACTIONS from CRUDE oil . |
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| 28. |
Identify the substance oxidized and the substance reduced fe2o3+2al=al2o3+2fe |
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Answer» Answer: Explanation: Here aluminium is oxidized and fe is REDUCED |
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| 29. |
In a binary solution mole fraction of the component is 0.85 what is the mole fraction of the other component |
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Answer» Answer: more components present in the solution other than solvent are CALLED ... For example, in a BINARY mixture, if the number of moles of A and. B are NA and nB respectively, the mole fraction of A will be. xA = |
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| 30. |
How will you separate a mixture of ammonium chloride sand and sodium chloride? |
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Answer» By FILTRATION !!☑️☑️☑️☑️☑️☑️ |
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| 31. |
Hydrogen gas combines with nitrogen to form ammonia translate into chemical equation |
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Answer» ANSWER: 3H₂ + N₂ ⇒ 2NH₃ |
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| 32. |
a sol. contains 7.45g kcl per litre of sol. it has an osmotic pressure of4.68atm at30k .calculate degree of dissociation for kcl in sol |
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Answer» Explanation: Solution is clear, particle SIZE is LESS than 1 nm, solute is completely soluble in SOLVENT. ... Particles insoluble in solvent. Large paticle size. Sol is a type of colloid inn which dispersed PHASE is solid and dispersion media is liquid. |
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| 33. |
Give reaction for formation of bleaching powder |
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Answer» Explanation: CA (OH)2 + Cl ---------> CaOcl2 + H2O |
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| 34. |
Photon having energy equivalent to the binding energy of 4th state of He+ atom is used to eject an electron from the metal surface of work function 1.4 EV. if the electrons are further accelerated through the potential difference of 4v then the minimum value of de Broglie wavelength associated with the electron is |
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Answer» 12mv2max=hv−ϕ∘=4eV−2eV=2eV Now, eV∘=2eV ⇒V∘=2V Hope HELPS |
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| 36. |
What is an orbital |
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Answer»
In atomic theory and QUANTUM MECHANICS, an atomic orbital is a mathematical FUNCTION that describes the wave-like behavior of either one ELECTRON or a pair of electrons in an atom mark it as brainliast if it helps |
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| 38. |
List all the valencies and symbols of elements and ions |
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Answer» H- Hydrogen Mn- Manganese He- Helium Fe -Iron Li -Lithium CO -Cobalt C -Carbon Ni-Nickel N -Nitrogen Cu -Copper O -Oxygen Zn -Zinc F-Fluorine Br-Bromine Ne -Neon Ag -Silver Na-Sodium Sn -Tin Mg-Magnesium I -Iodine Al-Aluminium Ba -Barium Si -Silicon W-Tungsten P- Phosphorus Pt-Platinum S-Sulphur / SULFUR AU -Gold Cl-Chlorine Hg-Mercury Ar-Argon PB -Lead K-Potassium Cr-Chromium Ca -Calcium Ti -Titanium Pu- Plutonium U-Uranium hope this helped you... have a nice day |
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| 39. |
What do you mean by reactant in a chemical reaction? |
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Answer» a substance that takes PART in and undergoes change during a reaction. |
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| 40. |
What is combination reaction of water with carbon dioxide? |
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Answer» Answer: H2O(Water)+CO2(CARBON dioxide) = H2CO3(CARBONIC ACID) THUS when water reacts with carbon dioxide, Carbonic acid is formed. |
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| 41. |
How to find no of elements of a cyclic group of a specific order? |
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Answer» Explanation: The ORDER of G is the number of elements in ⟨g⟩; that is, the order of an element is equal to the order of its CYCLIC subgroup. A cyclic GROUP is a group which is equal to one of its cyclic subgroups: G = ⟨g⟩ for some element g, called a GENERATOR. For a finite cyclic group with order. |
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| 42. |
How does the basic character of hydroxides of alkali metals vary down the group? |
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Answer» Explanation: The alkali metal oxides are basic in nature. ... As we move down the group, the size of the metal ION increases, so the bonding between the metal and hydroxide ion is WEAK. Hence, they can easily lose OH- ion. So, down the group, basicity of alkali metal oxides and HYDROXIDES increases. |
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| 43. |
How many number of neutrons are released in a fission of u – 235? |
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Answer» Explanation: Fission of U-235 NUCLEI typically releases 2 or 3 NEUTRONS, with an average of almost 2.5. |
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| 44. |
How can you say photosynthesis maintaining balance between oxygen and carbon dioxide? |
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Answer»
Because it takes CO2 from us an GIVE is O2 through which our respiration takes PLACE
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| 45. |
Heating a mixture of iron filings and sulfur produces a physical or chemical change |
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Answer» CHEMICAL change Explanation: |
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| 46. |
How are gases liquified ? Name a gas which can be soldified and called dry ice? |
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Answer» Gases are liquified when they are SUBJECTED to high pressure. A gas which can be solidified and is called DRY ice is CARBON Dioxide(CO2). |
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| 47. |
Identify the functional group present in acetone |
Answer» KetonesHope this will HELP you.. |
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| 48. |
Matels and non matels used in space research programes itc |
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Answer» <STRONG>Answer: Some of the metals used in space research SATELLITES are as under: Kevlar, a material that is used in bulletproof jackets, is very LIGHTWEIGHT and strong which MAKES it perfect for space travel. Aluminum isanother material that is used in space because of lightweight but it is not strong enough on its own . However when combined into ALLOYS with other metals it becomes stronger. Read more on Brainly.in - brainly.in/question/9719822#readmore |
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| 49. |
What is matter give example |
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Answer» Answer: MATTER is ANYTHING that occupies SPACE and has volume.eg perfume brick JUICE ETC |
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| 50. |
5 Mark's question class 11 chemistryhere is your question |
Answer» ✌Here is your answer✌refer to the ATTACHMENT ⚡Mahir⚡ |
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